<template>
  <n-breadcrumb>
    <n-breadcrumb-item v-for="(item, index) in levelList" :key="item.path">
      <span
        v-if="item.redirect === 'noRedirect' || index == levelList.length - 1"
        class="no-redirect"
        >{{ item.meta.title }}</span
      >
      <a v-else @click.prevent="handleLink(item)">{{ item.meta.title }}</a>
    </n-breadcrumb-item>
  </n-breadcrumb>
</template>

<script lang="ts" setup>
  import { ref, watchEffect } from 'vue';
  import type { RouteLocationMatched, RouteRecordRedirectOption } from 'vue-router';
  import { useRoute, useRouter } from 'vue-router';
  // 使用 useRoute 获取当前路由对象
  const route = useRoute();
  const router = useRouter();
  const levelList = ref<Array<RouteLocationMatched>>([]);

  function getBreadcrumb() {
    // // only show routes with meta.title
    let matched: any[] = route.matched.filter((item) => item.meta && item.meta.title);
    const first = matched[0];
    // // 判断是否为首页
    if (!isDashboard(first)) {
      matched = [{ path: '/index', meta: { title: '首页' } }].concat(matched);
    }

    levelList.value = matched.filter(
      (item) => item.meta && item.meta.title && item.meta.breadcrumb !== false,
    );
  }

  function isDashboard(route: RouteLocationMatched) {
    const name = route && (route.name as string);
    if (!name) {
      return false;
    }
    return name.trim() === 'Index';
  }
  function handleLink(item: RouteLocationMatched) {
    const { path } = item;
    const redirect: RouteRecordRedirectOption | unknown = item.redirect;
    if (redirect) {
      router.push(redirect);
      return;
    }
    router.push(path);
  }
  watchEffect(() => {
    // if you go to the redirect page, do not update the breadcrumbs
    if (route.path.startsWith('/redirect/')) {
      return;
    }
    getBreadcrumb();
  });
  getBreadcrumb();
</script>

<style lang="less" scoped>
  .app-breadcrumb.el-breadcrumb {
    display: inline-block;
    margin-left: 8px;
    font-size: 14px;
    line-height: 50px;
  }
</style>
